Review 4.1­4.3 Graphing
Graph using a table of values.
1. y = ­2x + 3
2. y = 4x ­ 1
3. x = 5
4. y = ­3
5. x ­ 2y = 6
6. x + 2y = ­8
Graph using intercepts.
7. y = ­6 + 3x
8. 2x + 4y = 16
9. 8x ­ 2y = 16
10. 8x ­ 2y = ­8
11. You are running in a marathon. You either run 8 miles per hour or walk 4 miles per hour.
a. Write an equation to show the relationship between time run and time walked during the 26.2 mile course.
b. Graph the equation from part a. What are some possible running and walking times if you complete the course?
c. If you walk for a total of 1 hour during the course, how long will you have spent running when you cross the finish line of the marathon?
12. Sara thought that there might be a relationship between the number of songs and the number of minutes of music recorded on a CD. She collected the following data from five CDs she had on her desk.
Number of songs, s
15
Number of minutes, m
44.9 31.5 40.6 50.5 71.6
12 13
16
18
Make a scatter plot on your graphing calculator. What relationship do the data suggest?
13. To check her findings, Sara collected data from five more CDs. Make a new scatter plot of these data. What relationship do the data suggest?
Number of songs, s
12 13
9
11
10
Number of minutes, m 46.8 40.6 67.0 53.0 56.1
8. Do you think there is a relationship between the number of songs and the number of minutes on a CD? Explain your reasoning. How could you test whether there is a relationship?